Tessera IT

Who can still log in to your business?

Most break-ins start with a stolen login or an account that should have been shut off. I check who has access to your email, payroll and systems, and give you a clear list of what to fix.

Email Adam about a checkup Serving small businesses in southern New Hampshire and the Merrimack Valley.
Picture every tile as an account. The outlined ones belong to people who left months ago. A checkup finds them so you can shut them off.

What a checkup looks at

It's a second set of eyes on the places where small businesses actually lose money. I look, I don't change anything, and it works alongside whoever handles your IT today.

Who has access to what

Every account in email, payroll, scheduling and vendor sites, compared against your current staff list. Former employees, shared logins and extra admin accounts are the usual finds.

Email protection

Two-step login, hidden forwarding rules, old sign-in methods that skip protection, and whether someone could send fake email that looks like it came from you.

How money moves

Who can change direct deposit or vendor bank details, and whether anyone double-checks those changes before a payment goes out.

Your locations

Guest Wi-Fi kept separate from office systems, back-office computers, and remote access tools that were installed once and forgotten.

How it works

  1. We agree on scope

    A short call, then a one-page agreement listing exactly what's covered and the fixed price.

  2. I review

    With read-only access, I go through accounts, email settings and payment controls. Nothing gets changed.

  3. You get a plain report

    Every finding says what it is, why it matters and how to fix it, sorted into fix now, fix this month, and plan for it.

No ongoing contract. Your own IT person can handle the fixes, or I can help with the account and access ones.

About

I'm Adam Pomerantz, an identity and access engineer based in Londonderry, New Hampshire. My day-to-day work is designing how people log in and what they're allowed to reach, with years of hands-on experience in Active Directory and enterprise login systems.

Tessera IT brings that same work to businesses that don't have a security team of their own.

For technical readers, some of my published work on identity systems is on GitHub.

Why "Tessera"

In ancient Rome, a tessera was a small token that proved who you were. Soldiers passed the night's watchword along on one. It's also the word for a single tile in a mosaic.

That's the job: making sure every person in your business has the right token, and that it stops working when they leave.

Start with a 15-minute call

Tell me a little about your business and I'll tell you what I'd look at. No pressure and no cost for the conversation.